Had pap smear done and it came back with hpv. had another pap smear done 2 weeks later, hpv negative. causes? why might this happen? should i worry?

Why?: Why did you have another one in 2 weeks?The samples could have been mixed up or the tech interpreted different.One could have been a better sample that the first.Was it the same type of HPV testing as some detect the RNA/DNA and some detect infection.Other tests specifically detect infection with HPV types 16 and 18, the two types that cause most HPV-associated cancers.